gnumeric 1.12.26
gnumeric 1.12.26

Closes #171.

Signed-off-by: Dominyk Tiller <53e438f55903875d07efdd98a8aaf887e7208dd3@gmail.com>

princeofdarkness76/homebrew-x11,BrewTestBot/homebrew-x11,UniqMartin/homebrew-x11